/Engine/Plugins/Experimental/Dataflow/Source/DataflowEditor/Public/Dataflow/DataflowGraphEditor.h
This delegate exists inSGraphEditorbut it is not multicast, and we are going to bind it toOnSelectedNodesChanged(). This new multicast delegate will be broadcast from the OnSelectedNodesChanged handler in case another class wants to be notified.
typedef TMulticastDelegate_OneParam< void, const FGraphPanelSelectionSet & > FOnSelectionChangedMulticast